RECON: TNO occultation with 471210

Event between (471210) 10VW11 and star GA0840:00461066 with event index number of 2460318

Geocentric closest approach at 2023/01/25 10:58:30 UTC

J2000 position of star is 04:51:32.8 -05:52:48
Equinox of date position of star is 04:52:40.3 -05:50:34
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 75 degrees from the moon. Moon is 18% illuminated.
TNO apparent brightness V=21.3

TNO is 36.8 AU from the Sun and 36.3 AU from the Earth.
The TNO is moving 16.9 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 84 seconds.
The 1-sigma cross-track error in the shadow position is 1429 km.

The TNO has an absolute magnitude Hv=5.5
Diameter=485.3 km assuming a 5% albedo -- 28.7 sec chord
Diameter=198.1 km assuming a 30% albedo -- 11.7 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 471210, (2023/01/25 10:59UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:38.9 -08:10:36  0.1  6.16  81
67Bet Eri      05:08:59.1 -05:03:30  2.8  4.13  79
61Ome Eri      04:54:01.8 -05:24:57  4.5  0.54  76
PPM 187431     04:53:54.3 -05:14:58  8.0  0.67  76
PPM 187406     04:52:27.1 -05:47:19  8.9  0.08  75
471210         04:52:40.7 -05:50:33 15.5        76
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 471210, (2023/01/25 10:59UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1  6.16  81
67Bet Eri      05:07:50.8 -05:05:13  2.8  4.13  79
61Ome Eri      04:52:53.7 -05:27:09  4.5  0.54  76
PPM 187431     04:52:46.1 -05:17:11  8.0  0.67  76
PPM 187406     04:51:19.1 -05:49:35  8.9  0.08  75
471210         04:51:32.8 -05:52:48 15.5        75
Positions are for J2000

Event circumstances last updated at 2022/12/02 03:09:40 UT

Marc W. Buie, Southwest Research Institute

RECON